package edu.sctu.lab04;

import java.sql.*;
import java.util.ArrayList;
import java.util.List;

/**
 * Created by Administrator on 2018/5/17.
 */
public class Database {
    public List<User> getuserList(){
        //数据库中读取保存在List集合中。
        List<User> userList=new ArrayList<User>();

        //3+1
        Connection connection=null;
        Statement statement=null;
        ResultSet resultSet=null;

        String sql="select * from t_users";

        try {
            Class.forName("com.mysql.jdbc.Driver");


        connection= DriverManager.getConnection(
                "jdbc:mysql://localhost:3306/sctu_javaweb_2018?serverTimezone=UTC",
                "root",
                "1314521");
        statement=connection.createStatement();
        resultSet=statement.executeQuery(sql);

        while (resultSet.next()){

            int id=resultSet.getInt(1);
            String username=resultSet.getString(2);
            String password=resultSet.getString(3);

            User user=new User();
            user.setId(id);
            user.setUsername(username);
            user.setPassword(password);

            userList.add(user);

        }
        resultSet.close();
        statement.close();
        connection.close();
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        } catch (SQLException e) {
            e.printStackTrace();
        }
        return userList;
    }

}
